Food security,food safety and environmental protection are major livelihood issues in front of the Chinese people.The priorities of the three are different,and there is mutually dependent and contradictory relationshi...Food security,food safety and environmental protection are major livelihood issues in front of the Chinese people.The priorities of the three are different,and there is mutually dependent and contradictory relationship among them.Facing the triple pressures of food security,food safety,and environmental protection,this paper analyzes the priority of the three from the historical development,then further analyzes the interaction between food security,food safety and environmental protection and finally puts forward the healthy development of food security,food safety and environmental protection,and the proper settlement of the three problems.展开更多
Erosion and transport of soil has worldwide implications for agriculture, landscape stability, climate, natural hazards, and clean, renewable resources of water and air. Assured access to clean water and a healthy and...Erosion and transport of soil has worldwide implications for agriculture, landscape stability, climate, natural hazards, and clean, renewable resources of water and air. Assured access to clean water and a healthy and safe environment requires an ethic of conservation and protection. The minimum scale in which these principles apply successfully is basin wide. These are the fundamental concerns of the Sino-US Centers for Soil and Water Conservation and Environmental Protection.展开更多
Heat strain experienced by individuals wearing chemical protective clothing(CPC)is severe and dangerous especially in hot-humid environment.The development of material science and interdisciplinary studies including e...Heat strain experienced by individuals wearing chemical protective clothing(CPC)is severe and dangerous especially in hot-humid environment.The development of material science and interdisciplinary studies including ergonomics,physiology and heat transfer is urgently required for the reduction of heat strain.The aim of this paper was to study the relationship among clothing thermal properties,physiological responses and environmental conditions.Three kinds of CPC were selected.Eight participants wore CPC and walked(4 km/h,two slopes with 5%and 10%)on a treadmill in an environment with(35±0.5)℃ and RH of(60±5)%.Core temperature,mean skin temperature,heart rate,heat storage and tolerance time were recorded and analyzed.Physiological responses were significantly affected by the clothing thermal properties and activity intensity in hot-humid environment.The obtained results can help further development of heat strain model.New materials with lower evaporative resistance and less weight are necessary to release the heat strain in hot-humid environments.展开更多
At the normal pool level of 175 m, the inundated areas of the Three Gorges Reservoir involve 2 cities, 11 county seats and 140 towns. The population of the cities and towns under the inundated line totals 393 000 peop...At the normal pool level of 175 m, the inundated areas of the Three Gorges Reservoir involve 2 cities, 11 county seats and 140 towns. The population of the cities and towns under the inundated line totals 393 000 people(1985). These affected cities and towns will be rebuilt by means of moving backward to a higher elevation or to other places.The cities and towns to be relocated are the regional political, economic and cultural centres, and serve as traffic complexes and places of goods gathering and distributing. They are also the seats containing some important cultural relics and historic sites, landscaping and scenic spots. The relocation of the cities and towns will generate far-reaching impacts on regional socio-economy and environment. The unreasonable excavation and fill or the improper protective measures adopted may induce land slide,collapse and soil loss. The ruins and wastes will affect the water quality in the early period of impoundment of the Three Gorges Reservoir. A large demand of timber may result in forest fall excessively in the local area of the reservoir region, and lower forest and vegetation coverage rate may lead to soil loss. The relocation of the cities and towns will increase urbanization in reservoir, improve the infrastructure, enhance their location function and economic radiation capacity. The negative impact will reach its maximum during relocation peak period, and the environmental quality will be progressively improved with the recovery of the functions of the relocated cities and towns and the implementation of environmental protection measures. Finally, the negative impact will be offset, and the negative impact will be changed into positive environmental elements.展开更多
The urban lake ecosystem has the characteristics of long-term,complex and comprehensive in its ecological restoration process because it is related to social and economic activities at multiple levels.Located in Hangz...The urban lake ecosystem has the characteristics of long-term,complex and comprehensive in its ecological restoration process because it is related to social and economic activities at multiple levels.Located in Hangzhou City,China,the West Lake is a national-level scenic spot and a world heritage cultural landscape.It provides key ecosystem services for the city and has a significant impact on the urban ecological environment and the well-being of citizens.The West Lake has undergone an 1800-year governance process in history,realizing the harmonious coexistence with Hangzhou City.Since modern times,due to the rapid development of urbanization and industrialization,the water quality of the West Lake and its freshwater ecosystem have been greatly damaged.Since 2002,Hangzhou City has achieved the overall restoration of the West Lake ecosystem through a series of measures,such as water diversion projects,dredging projects,and the West Lake comprehensive protection project,and the water environment and lakeshore landscape have been greatly improved.This study analyzed the restoration technology of the West Lake ecosystem from two scales of the watershed and the site and discussed the water ecological governance system of the West Lake in the past 20 years.Through thedata analyses of the West Lake land use,vegetation,TP,TN,NH_(3)-N,COD_(Mn) and other multi-environmental factors,the results showed that the water quality,transparency and eutrophication of the West Lake had been greatly improved.At the same time,the application of large-scale restoration methods and technologies also required long-term observation,and attention should be paid to the proliferation of alien species and the loss of heritage value,so as to further avoid potential ecological risks caused by ecological restoration.展开更多
Urea,paracetamol and glutamine(based on the expired drugs)were selected as vapor-phase corrosion inhibitors(VCIs)to study their corrosion protection effect on red copper in simulated marine atmospheric environment by ...Urea,paracetamol and glutamine(based on the expired drugs)were selected as vapor-phase corrosion inhibitors(VCIs)to study their corrosion protection effect on red copper in simulated marine atmospheric environment by using weight loss,electrochemical measurement techniques(specially designed electrochemical testing device for simulating marine atmospheric environments)and surface morphology characterization analysis(SEM/EDS,XRD,RAMAN,XPS).Weight loss results show that the three corrosion inhibitors have good corrosion inhibition effect on red copper,and the corrosion inhibition efficiency in the order of glutamine(83.62%)>urea(68.46%)>paracetamol(61.47%).Surface morphology characterization analysis provides evidence of adsorption of corrosion inhibitors molecules on the red copper surface,thus forming a protective film that blocked the red copper surface from the aggressive chloride ion attack.展开更多
基金the research fruits of"A Study of the Public Interest Litigation and Security Mechanism for the Quality and Safety of Agricultural Products"(15BGL135),a general project granted by the National Social Sciences Planning Office.
文摘Food security,food safety and environmental protection are major livelihood issues in front of the Chinese people.The priorities of the three are different,and there is mutually dependent and contradictory relationship among them.Facing the triple pressures of food security,food safety,and environmental protection,this paper analyzes the priority of the three from the historical development,then further analyzes the interaction between food security,food safety and environmental protection and finally puts forward the healthy development of food security,food safety and environmental protection,and the proper settlement of the three problems.
文摘Erosion and transport of soil has worldwide implications for agriculture, landscape stability, climate, natural hazards, and clean, renewable resources of water and air. Assured access to clean water and a healthy and safe environment requires an ethic of conservation and protection. The minimum scale in which these principles apply successfully is basin wide. These are the fundamental concerns of the Sino-US Centers for Soil and Water Conservation and Environmental Protection.
文摘Heat strain experienced by individuals wearing chemical protective clothing(CPC)is severe and dangerous especially in hot-humid environment.The development of material science and interdisciplinary studies including ergonomics,physiology and heat transfer is urgently required for the reduction of heat strain.The aim of this paper was to study the relationship among clothing thermal properties,physiological responses and environmental conditions.Three kinds of CPC were selected.Eight participants wore CPC and walked(4 km/h,two slopes with 5%and 10%)on a treadmill in an environment with(35±0.5)℃ and RH of(60±5)%.Core temperature,mean skin temperature,heart rate,heat storage and tolerance time were recorded and analyzed.Physiological responses were significantly affected by the clothing thermal properties and activity intensity in hot-humid environment.The obtained results can help further development of heat strain model.New materials with lower evaporative resistance and less weight are necessary to release the heat strain in hot-humid environments.
文摘At the normal pool level of 175 m, the inundated areas of the Three Gorges Reservoir involve 2 cities, 11 county seats and 140 towns. The population of the cities and towns under the inundated line totals 393 000 people(1985). These affected cities and towns will be rebuilt by means of moving backward to a higher elevation or to other places.The cities and towns to be relocated are the regional political, economic and cultural centres, and serve as traffic complexes and places of goods gathering and distributing. They are also the seats containing some important cultural relics and historic sites, landscaping and scenic spots. The relocation of the cities and towns will generate far-reaching impacts on regional socio-economy and environment. The unreasonable excavation and fill or the improper protective measures adopted may induce land slide,collapse and soil loss. The ruins and wastes will affect the water quality in the early period of impoundment of the Three Gorges Reservoir. A large demand of timber may result in forest fall excessively in the local area of the reservoir region, and lower forest and vegetation coverage rate may lead to soil loss. The relocation of the cities and towns will increase urbanization in reservoir, improve the infrastructure, enhance their location function and economic radiation capacity. The negative impact will reach its maximum during relocation peak period, and the environmental quality will be progressively improved with the recovery of the functions of the relocated cities and towns and the implementation of environmental protection measures. Finally, the negative impact will be offset, and the negative impact will be changed into positive environmental elements.
基金Supported by the Zhejiang Provincial Natural Science Foundation Public Welfare Project"Research on the Construction Method of Ecological Building Curtain Wall Based on Biomimetic Technology"(18082087-D)Science Foundation of Zhejiang Sci-Tech University(ZSTU)"Research on Optimization of Urban Protected Area Planning System Under the Guidance of Collaborative Governance"(22082150-Y)。
文摘The urban lake ecosystem has the characteristics of long-term,complex and comprehensive in its ecological restoration process because it is related to social and economic activities at multiple levels.Located in Hangzhou City,China,the West Lake is a national-level scenic spot and a world heritage cultural landscape.It provides key ecosystem services for the city and has a significant impact on the urban ecological environment and the well-being of citizens.The West Lake has undergone an 1800-year governance process in history,realizing the harmonious coexistence with Hangzhou City.Since modern times,due to the rapid development of urbanization and industrialization,the water quality of the West Lake and its freshwater ecosystem have been greatly damaged.Since 2002,Hangzhou City has achieved the overall restoration of the West Lake ecosystem through a series of measures,such as water diversion projects,dredging projects,and the West Lake comprehensive protection project,and the water environment and lakeshore landscape have been greatly improved.This study analyzed the restoration technology of the West Lake ecosystem from two scales of the watershed and the site and discussed the water ecological governance system of the West Lake in the past 20 years.Through thedata analyses of the West Lake land use,vegetation,TP,TN,NH_(3)-N,COD_(Mn) and other multi-environmental factors,the results showed that the water quality,transparency and eutrophication of the West Lake had been greatly improved.At the same time,the application of large-scale restoration methods and technologies also required long-term observation,and attention should be paid to the proliferation of alien species and the loss of heritage value,so as to further avoid potential ecological risks caused by ecological restoration.
基金Project(ZR2023ME063)supported by the Shandong Provincial Natural Science Foundation,ChinaProject(121311KYSB20210005)supported by the Overseas Science and Education Cooperation Center Deployment Project,ChinaProject supported by the Qingdao Expert Workstation for Intelligent Anticorrosion for Water Diversion Project,China。
文摘Urea,paracetamol and glutamine(based on the expired drugs)were selected as vapor-phase corrosion inhibitors(VCIs)to study their corrosion protection effect on red copper in simulated marine atmospheric environment by using weight loss,electrochemical measurement techniques(specially designed electrochemical testing device for simulating marine atmospheric environments)and surface morphology characterization analysis(SEM/EDS,XRD,RAMAN,XPS).Weight loss results show that the three corrosion inhibitors have good corrosion inhibition effect on red copper,and the corrosion inhibition efficiency in the order of glutamine(83.62%)>urea(68.46%)>paracetamol(61.47%).Surface morphology characterization analysis provides evidence of adsorption of corrosion inhibitors molecules on the red copper surface,thus forming a protective film that blocked the red copper surface from the aggressive chloride ion attack.
